When I first read the headline of this article—“‘Millennia of human activity’: heatwave reveals lost UK archaeological sites”—I imagined something like a fantasy movie in which some hulking ancient ruin comes heaving out of the ground, astounding the watching crowd.
But that’s not what’s actually happening, which is this sort of thing:
Those are what’s called scorch marks:
Lost sites have been turning up all over Britain and Ireland, ploughed flat at ground level but showing up as parch marks from the air, in areas where grass and crops grow at different heights, or show in different colours, over buried foundations and ditches. A treasure trove of discoveries, including ancient field boundaries, lost villages, burial mounds and military structures, was revealed on Wednesday, recorded during the summer by aerial archaeologists flying over the landscape for Historic England…
Among dozens of sites revealed in Cornwall were an unusual prehistoric settlement surrounded by concentric ditches at Lansallos, and an iron age settlement surrounded by a circular ditch with marks of other circular and rectangular structures within one field at St Ive – evidence of continuity of settlement over at least 4,000 years.
What is believed to be a Roman farm, with buildings, fields and paddocks, has showed up at Bicton in Devon, and at Stogumber in Somerset four bronze and iron age farms have been spotted, one with signs of having been abandoned and a new settlement built on top.
It’s as though these structures and settlements had been written in invisible ink, and the drought was the catalyst for revealing the messages they hold. Excavation will further reveal them.
It’s interesting, too, that in a slight parallel, some invisible inks are revealed by the process of being heated, which usually turns them brown.



